Of course not you twonk. I don't need to be told that racism is wrong, that is something that is patently obvious. The difference here is that rather than reinforcing a message to an individual who doesn't comply with the norm, everybody is being forced to loudly and forcibly demonstrate that they are in fact in agreement.
I believe that all forms of discrimination are wrong, and I also believe that the vast majority of people feel the same, but they would rather simply get on with their lives without having to make pointless gestures of visible compliance because a vocal minority of Social Media loudmouths will otherwise point the finger of shame at them.
Stating that "the knee" is gesture politics does not make me a racist, but I hope it indicates that I am a realist.